말리카 나지바 Kong, Jimin Khalid, Hamza Jarom？r Hn？t Park, Hyun S. Bouzek, Karel Henkensmeier, Dirk 2024-01-12T02:31:46Z 2024-01-12T02:31:46Z 2023-01-10 2023-03 0376-7388 https://pubs.kist.re.kr/handle/201004/75782 Stability of membranes in electrolysers is challenged by dimensional changes, when dry membranes are assembled and wetted when the electrolyser starts. Assembling wet membranes is challenging because water evaporates during handling. To minimize dimensional changes, FAA3 membranes are pre-swollen in aqueous ethylene glycol (EG, boiling point 197？C). Membranes partially dissolve in 100 vol% EG, and swell excessively in 70 vol%. Swelling in 50 vol% shows smallest dimensional changes during handling (shrink) and re-immersion in KOH solution (swelling, mimicking start of the electrolyser). These membranes show about 30% higher conductivity (ca. 65 mS cm？ 1). Tensile strength and Young’s Modulus decrease exponentially with the amount of absorbed EG solution, while elongation at break increases. In addition to the improved dimensional stability during handling, EG treated membranes perform better in the electrolyser than untreated membranes. In a stability test over 120 h at 250 mA/cm2 , all membranes show an initial drop in the cell voltage and then stabilize. English Elsevier BV Pre-swelling of FAA3 membranes with water-based ethylene glycol solution to minimize dimensional changes after assembly into a water electrolyser: Effect on properties and performance Article 10.1016/j.memsci.2022.121344 1 Journal of Membrane Science, v.670, no.15 Journal of Membrane Science 670 15 Y scie scopus 000921537500001 Engineering, Chemical Polymer Science Engineering Polymer Science Article POWER-TO-GAS POLYMER ELECTROLYTE POLYSULFONE MEMBRANES Anion exchange membrane Pre-swelling Ethylene glycol Water electrolysis Dimensional changes